K-Pak Color Therapy Shampoo Joico KPak Color Therapy Shampoo is a shampoo specifically designed for damaged, color treated hair. This color therapy shampoo doubles the vibrancy of the hair color and is the ultimate in long lasting color and healthy hair. Joico K-Pak Color Therapy Shampoo nourishes the hair and seals in moisture to give that moisture kick color treated hair needs. All Joico K-Pak Color Therapy products feature the QuadraBond Peptide Complex. This new generation of technology features a premium blend of peptides, African Manketti Oil, arginine, and a unique polymer system that address the B-layer (hair's first line of defense against color loss). This dual-benefit system resurfaces the B-layer and reconstructs the hair to ensure damaged hair holds onto color for twice as long than with regular shampoo. Joico K-Pak Color Therapy protects against broad spectrum UV light and environmental oxidation. Joico K-Pak Color Therapy is for color treated hair that is lightened more than 2 levels, double-processed, weak, fragile or structurally unsound, and chemically textured.